If a Direct Debit payment goes unpaid for an active customer (i.e., an ARUDD is received) it is marked as unpaid in Access PaySuite DDCMS.
If a customer is cancelled but the Direct Debit contract hasn't been Cancelled and Archived, Access PaySuite DDCMS will still expect payments. As a result, unpaid payments may appear in the contract's payment history, on the Uncollected Payments report, and accrue arrears. These payments aren't being requested from the customer's bank, but they will still be visible in these areas until the contract is properly archived.
To accurately reflect payments requested from the customer's bank, download the Transaction Summary report from Access PaySuite DDCMS and set Include "not-presented" to No.